If Vitalik Buterin does not drop his hands, then Etherium will continue to exist and grow in price!
I dont think theres anything at all that depends on Buterin, the project is already self-sufficient, it has a huge developer community, the price of the ethereum will certainly still be restored and take on new heights.
Ethereum is one of the most influential projects on the market, it is obvious that they will talk a lot about it at the forum.
I recognize Buterin as a talented and outstanding man, he has invented ERC20 for current ICO projects. But behind him is a lot of other people, and maybe they have more ideas for better ETH than Buterin.